Needle-valve.



2. m g 0 3 Fn e D d e. t n nu t a n.. L L A C c M M H.

NEEDLE vALvE. {Application led .Tune 26, 1902,)

(No Model.)

Tus nomas PETERS ou.. mmouma. wAsmnuoN. u. c.

UNITED STATES FATnNT @erica HARRY M. MCCALL, OF PIITSBURG, PENNSYLVANIA, ASSIGNOR TO PITTS- BRG GAS ENGINE COIWIPANY, OF PITTSBURG, PENNSYLVANIA.

N EEDLLEVA LVE.

SPECIFICATION forming part of Letters Patent No. 717,437, dated December 30, 1902.

I Application filed June 26, 1902. Serial No. 1131351. (No model.)

To all whoa@ it may concern:

Be it known that I, HARRYM. MCCALL, a citizen of the United States, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Needle-Valves, of which the following is a specification, reference being had therein to the accompanying drawings.

lo This invention has relation to needlevalves; and it consists in the novel construction and arrangement of its parts, as hereinafter described. n

The object of the invention is to provide a needle-valve especially adapted to be used in connections conducting hydrocarbon oil, the valve being provided with a double seat, with a compartment located between the seats in which sediment may collect and free the seats zo of the same. Y

In' the accompanying drawings, Figure l is asectional View of the Valve-casing and valve. Fig. 2 is a top plan View of the valve-casing, partly in section; and Fig. 3 is a transverse 'sectional view of the valve-casing, cut on the line 3 3 of Fig. l.

The needle-valve l is provided with the casing 2, said casing having a valve-seat 3 and a valve-seat 4f, with an enlarged chamber point of the valve 1 is adapted to engage both the seats`3 and 4 when the valve is closed. When the valve is opened, the capacity of the passage for the oil at the seat 3 i being larger than that at the seat l the chamber 5 will ill with oil, the said oil being for a shortA period of time retained in the said chamber;

5 interposed between the two said seats. The" Y The heavy particles carried by the said oil will deposit along the bottom of the said chamber 5, and thus the said seat LLis relieved of 4o said deposits, and the seats 3 and l are freed of the same. The bottom of the chamber 5 is provided With a cap 6, which may be removed, and the said chamber may be iiushed out.

By providing a needle-valve of the construction as shown and described the oil is admitted to a gas-engine or other machine practically freed of all heavy and foreign substances, and thus the valves or valve-seats are 5o relieved from the wear that such substances cause.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is-- f 5 5 A valve consisting of a casin g having an enlarged chamber with two valve-seats located at opposite sides thereof, said chamber adapt- `ed to be filled with liquid which for a short period of time remains substantially station- 6o ary within the chamber, and permits solid or foreign matter to precipitate in the chamber, a valve passing through said chamber and adapted to engage the valve-seats at the opposite sides of the chamber and open or close the said seats simultaneously said chamber having in its side a means through which the precipitation may be removed.

In testimony whereof I afiiX my signature in the presence of two witnesses.

HARRY M. MGCALL. `Vitnesses:

THOMAS M. Rans, J osnPH H. BLAOKMORE. 

